2008 NISSAN TEANA ignition

AV-68
< FUNCTION DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
 Displays the communication status between AV control unit (mas-
ter unit) and each unit.
 The error counter displays “OK” if any malfunction was not
detected in the past and displays “0” if a malfunction is detected. It
increases by 1 if the condition is normal at the next ignition switch
ON cycle. The upper limit of the counter is 39.
 If it resets, the error counter is erased.
Delete Unit Connection Log
Deletes any unit connection records and error records from the AV
control unit memory. (Clear the records of the unit that has been
removed)
CONSULT-III Function (MULTI AV)INFOID:0000000003882712
CONSULT-III FUNCTIONS
CONSULT-III performs the following functions via the communication with the AV control unit.
AV COMMUNICATION
When “AV communication” of “CAN Diag Support Monitor” is selected, the following function will be performed.
SELF-DIAGNOSIS RESULTS
 In CONSULT-III self-diagnosis, self-diagnosis results and error history are displayed collectively.
 The timing is displayed as “0” if any of the error codes [U1000], [U1010], [U1300] and [U1310] is detected.
The counter increases by 1 if the condition is normal at the next ignition switch ON cycle.
Self-diagnosis Results Display Item
ItemsStatus
(Current)Counter
(Past)
C Tx(ITM–SW) OK / UNKWN OK / 0 – 39
C Rx(PrimarySW–ITM) OK / UNKWN OK / 0 – 39
C Rx(RrSeatSW–ITM) OK / UNKWN OK / 0 – 39
C Rx(RearCamera–ITM) OK / UNKWN OK / 0 – 39
JSNIA1439GB
JSNIA0154GB
Diagnosis mode Description
Ecu Identification The part number of AV control unit can be checked.
Self Diagnostic ResultPerforms a diagnosis on the AV control unit and a connection diagnosis for the communication
circuit of the Multi AV system, and displays the current and past malfunctions collectively.
Data Monitor The diagnosis of vehicle signal that is input to the AV control unit can be performed.
AV communicationAV&NAVI C/UDisplays the communication status from AV control unit to each unit as well as the error
counter.
AUDIO Displays the AV control unit communication status and the error counter.
Error item Detection logic Possible malfunction factor/Action to take
CAN COMM CIRCUIT [U1000]CAN communication malfunction is detect-
ed.Refer to AV- 7 2 , "
DiagnosisProcedure".

AV-70
< FUNCTION DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
DATA MONITOR
ALL SIGNALS
 Displays the status of the following vehicle signals inputted to the AV control unit.
 For each signal, actual signal can be compared with the condition recognized on the system.
SELECTION FROM MENU
 AV COMM CIRCUIT [U1300]
 REAR-CAMERA LAN CONN [U1252]With rear control switch
When either one of the following items is
detected:
 camera control unit power supply and
ground circuits are malfunctioning.
 AV communication signal between AV
control unit and Camera control unit is
malfunctioning.
 AV communication circuits between mul-
tifunction switch and rear control switch
are malfunctioning.
 AV communication circuits between rear
control switch and camera control unit
are malfunctioning. Camera control unit power supply and
ground circuits
Refer to AV- 8 4 , "
CAMERA CONTROL
UNIT : Diagnosis Procedure".
 AV communication circuits between mul-
tifunction switch and rear control switch
 AV communication circuits between rear
control switch and camera control unit
Without rear control switch
When either one of the following items is
detected:
 camera control unit power supply and
ground circuits are malfunctioning.
 AV communication circuits between AV
control unit and camera control unit is
malfunctioning.
 AV communication signal between AV
control unit and camera control unit is
malfunctioning.  Camera control unit power supply and
ground circuits
Refer to AV- 8 4 , "
CAMERA CONTROL
UNIT : Diagnosis Procedure".
 AV communication circuits between mul-
tifunction switch and camera control unit
 AV COMM CIRCUIT [U1300]
 SWITCH CONN [U1240]
 REAR-CAMERA LAN CONN [U1252]When either one of the following items is
detected:
 AV communication circuits between AV
control unit and multifunction switch are
malfunctioning.
 AV communication signal between AV
control unit and multifunction switch is
malfunctioning.AV communication circuits between AV
control unit and multifunction switch Error item Detection logic Possible malfunction factor/Action to take
Display Item Display Vehicle status Remarks
VHCL SPD SIGOn Vehicle speed >0 km/h (0 MPH)
Changes in indication may be delayed. This is
normal. Off Vehicle speed =0 km/h (0 MPH)
PKB SIGOn Parking brake is applied.
Off Parking brake is released.
ILLUM SIGOnBlock the light beam from the auto
light optical sensor when the light
switch is ON .
—
OffExpose the auto light optical sensor
to light when the light switch is OFF
or ON.
IGN SIGOn Ignition switch ON
Off Ignition switch in ACC position
REV SIGOn Selector lever in R position
Changes in indication may be delayed. This is
normal.
OffSelector lever in any position other
than R

AV-72
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003882713
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each
control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to LAN-22, "
CAN Communication Signal Chart".
DTC LogicINFOID:0000000003882714
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003882715
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result” of “MULTI AV”.
Is
“CAN COMM CIRCUIT” displayed?
YES >> Refer to “LAN system”. Refer to LAN-14, "Trouble Diagnosis Flow Chart".
NO >> Refer to GI section. Refer to GI-35, "
Intermittent Incident".
DTCDisplay contents of CON-
SULT-IIIDiagnostic item is detected when... Probable malfunction location
U1000 CAN COMM CIRCUITWhen AV control unit is not transmitting or re-
ceiving CAN communication signal for 2 sec-
onds or more.CAN communication system

AV
U1243 DISPLAY UNIT
AV-77
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
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U1243 DISPLAY UNIT
DescriptionINFOID:0000000003882725
DTC LogicINFOID:0000000003882726
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003901200
1.CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Refer to AV-82, "
DISPLAY UNIT : Diagnosis Procedure".
Is inspection result normal?
YES >> GO TO 2.
NO >> Repair malfunctioning parts.
2.CHECK CONTINUITY COMMUNICATION CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector and AV control unit connector.
3. Check continuity between display unit harness connector and AV control unit harness connector.
4. Check continuity between display unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
Part name Description
DISPLAY UNIT Display image is controlled by the serial communication from AV control unit.
 It receives the power (signal VCC and inverter VCC) from the AV control unit
and operates.
 RGB image signal is input from AV control unit (RGB, RGB area and RGB syn-
chronizing).
 Composite image (DVD, AUX and camera images) signal is input from AV con-
trol unit.
 Synchronize signal (HP, VP) is output to AV control unit.
DTCDisplay contents of
CONSULT-IIIDTC Detection Condition Possible causes
U1243FRONT DISP CONN
[U1243]When either one of the following items is detected:
 display unit power supply and ground circuits are mal-
functioning.
 serial communication circuits between display unit and
AV control unit are malfunctioning.
 serial communication signal between display unit and
AV control unit is malfunctioning. Display unit power supply and
ground circuits.
 Serial communication circuits be-
tween display unit and AV control
unit
Display unit AV control unit
Continuity
Connector Terminals Connector Terminals
M4911
M12956
Existed
22 44
Display unit
GroundContinuity
Connector Terminals
M4911
Not existed
22

AV-78
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
U1243 DISPLAY UNIT
3.CHECK COMMUNICATION SIGNAL
1. Connect display unit connector and AV control unit connector.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector terminal and ground using an oscilloscope.
Is inspection result normal?
YES >> GO TO 4.
NO >> Replace AV control unit.
4.CHECK COMMUNICATION SIGNAL
Check signal between display unit harness connector terminal and ground using an oscilloscope.
Is inspection result normal?
YES >> INSPECTION END
NO >> Replace display unit.
(+)
(−) Condition Reference value Display unit
Connector Terminal
M49 11 GroundWhen adjusting display bright-
ness.
PKIB5039J
(+)
(−) Condition Reference value Display unit
Connector Terminal
M49 22 GroundWhen adjusting display bright-
ness.
PKIB5039J

AV
U1250 CAMERA CONTROL UNIT
AV-79
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
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U1250 CAMERA CONTROL UNIT
DescriptionINFOID:0000000003882728
DTC LogicINFOID:0000000003882729
Diagnosis ProcedureINFOID:0000000003901201
1.CHECK CONTINUITY RECOGNITION SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector and camera control unit connector.
3. Check continuity between AV control unit harness connector and camera control unit harness connector.
4. Check continuity between display unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 2.
NO >> Repair harness or connector.
2.CHECK AV CONTROL UNIT VOLTAGE
1. Connect AV control unit connector and camera control unit connector.
2. Turn ignition switch ON.
3. Check signal between AV control unit harness connector terminal and ground using an oscilloscope.
Is inspection result normal?
YES >> Replace AV control unit.
Part name Description
CAMERA CONTROL UNIT Camera image signal is input from rear view camera. Camera image signal
output to AV control unit.
 Power supply is transmitted to rear view camera.
 AV control unit recognizes the presence of camera system with camera con-
nection recognition signal.
 Camera control unit is connected via AV communication.
DTCDisplay contents of
CONSULT-IIIDTC Detection Condition Possible causes
U1250CAMERA CONT. CONN
[U1250]Malfunction is detected in camera connection recogni-
tion signal circuit.Camera connection recognition sig-
nal circuit.
AV control unit Camera control unit
Continuity
Connector Terminals Connector Terminals
M130 68 B251 14 Existed
AV control unit
GroundContinuity
Connector Terminals
M130 68 Not existed
(+)
(−) ConditionVo l ta g e
(Approx.) AV control unit
Connector Terminal
M130 68 GroundConnected camera
control unit connector0 V
Disconnect camera
control unit connector5 V

AV-82
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis ProcedureINFOID:0000000003901202
1.CHECK FUSE
Check for blown fuses.
Is inspection result normal?
YES >> GO TO 2.
NO >> Be sure to eliminate cause of malfunction before installing new fuse.
2.CHECK POWER SUPPLY CIRCUIT
Check voltage between AV control unit harness connectors and ground.
Is inspection result normal?
YES >> GO TO 3.
NO >> Check harness between AV control unit and fuse.
3.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect AV control unit connectors.
3. Check continuity between AV control unit harness connectors and ground.
Is inspection result normal?
YES >> INSPECTION END
NO >> Repair harness or connector.
DISPLAY UNIT
DISPLAY UNIT : Diagnosis ProcedureINFOID:0000000003901446
1.CHECK POWER SUPPLY CIRCUIT (DISPLAY SIDE)
Check voltage between display unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 4.
NO >> GO TO 2.
Power source Fuse No.
Battery 31
Ignition switch ACC or ON 19
Ignition switch ON or START 4
Signal name Connector No. Terminal No. Ignition switch position Voltage (Approx.)
Battery power supply
M12719 OFF
Battery voltage ACC power supply 7 ACC
Ignition signal M131 104 ON
Signal name Connector No. Terminal No. Ignition switch position Continuity
GroundM127 20
OFF Existed
M131 85
Signal name Connector No. Terminal No. Ignition switch position Voltage (Approx.)
Inverter VCC
M492
ACC 9 V
Signal VCC 3

AV
POWER SUPPLY AND GROUND CIRCUIT
AV-83
< COMPONENT DIAGNOSIS >[BASE AUDIO AND DISPLAY SYSTEM]
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2.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the harness connector between display unit and AV control unit.
3. Check continuity between display unit harness connector and AV control unit harness connector.
4. Check continuity between display unit harness connector and ground.
Is inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK POWER SUPPLY CIRCUIT (AV CONTROL UNIT SIDE)
1. Connect the AV control unit harness connector.
2. Turn ignition switch ACC.
3. Check voltage between AV control unit harness connector and ground.
Is inspection result normal?
YES >> INSPECTED END.
NO >> Replace AV control unit.
4.CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector.
3. Check continuity between display unit harness connector and ground.
Is inspection result normal?
YES >> INSPECTED END.
NO >> Repair harness or connector.
MULTIFUNCTION SWITCH
MULTIFUNCTION SWITCH : Diagnosis ProcedureINFOID:0000000003901204
1.CHECK FUSE
Check for blown fuses.
Is inspection result normal?
Signal nameDisplay unit AV control unit
Continuity
Connector No. Terminal No. Connector No. Terminal No.
Ground M492
M12959
Existed
347
Signal nameDisplay unit
GroundContinuity
Connector No. Terminal No.
Inverter VCC
M492
Not existed
Signal VCC 3
Signal name Connector No. Terminal No. Ignition switch position Voltage (Approx.)
Inverter VCC
M12959
ACC 9 V
Signal VCC 47
Signal nameDisplay unit
GroundContinuity
Connector No. Terminal No.
Ground M49 1 Existed
Power source Fuse No.
Ignition switch ACC or ON 19